//
//  NSString+DFExtension.m
//  Pods
//
//  Created by rujia chen on 2017/04/04.
//
//

#import "NSString+DFExtension.h"
#import <CommonCrypto/CommonDigest.h>

@implementation NSString (DFExtension)

- (NSString *)df_stringUsingMD5 {
    const char *cStr = [self UTF8String];
    unsigned char result[16];
    CC_MD5(cStr, (CC_LONG)strlen(cStr), result);
    return [NSString stringWithFormat:
            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
            result[0], result[1], result[2], result[3],
            result[4], result[5], result[6], result[7],
            result[8], result[9], result[10], result[11],
            result[12], result[13], result[14], result[15]
            ];
}

- (BOOL)df_validByRegex:(NSString *)regex {
    NSPredicate *regExPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [regExPredicate evaluateWithObject:self];
}

- (CGSize)df_sizeWithFont:(UIFont *)font {
    return [self df_sizeWithFont:font maxWidth:MAXFLOAT];
}

- (CGSize)df_sizeWithFont:(UIFont *)font maxWidth:(CGFloat)maxWidth {
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSFontAttributeName] = font;
    CGSize maxSize = CGSizeMake(maxWidth, MAXFLOAT);
    return [self boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;
}

@end
